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Income Taxes Domestic and international components of the loss from operations before income taxes (Details) - USD ($)
$ in Thousands
12 Months Ended
Jan. 31, 2020
Jan. 31, 2019
Jan. 31, 2018
Income Tax Disclosure [Abstract]      
Domestic $ (63,390) $ (64,653) $ (58,875)
International (57,057) (9,962) (7,528)
Loss from operations before income taxes $ (120,447) $ (74,615) $ (66,403)